Building material



1933- D. H. SWEET I 1,934,831

BUILDING MATERIAL Filed June 28, 1930 Patented 14, 7'

Donald sweetlEvanston, 111., assignor. to Thej V I Logan lio ig"Company Qhicago; ;Ill a corpommal'2811950,.scams. 464,552.6

irearms.- lg osq V a started as in Fig.2, but the next ;course'. 60 is I laid With its tabs'hooked into-the angles 32-Of the coursebelow, and the succeeding' courses 62, 7

- My invention relates to building material, and includes among its objects andi-advantages the fabri'oat'iongof improved roofs and an improved lockshingle'for-usein fabricating suchfr'oofs. 'In the accompanying drawing:

; Figfl-is a diagramindicating how iny shingle can be cut -from a-strip'ofmaterial without 'waste.

Fig. 2 is a plan view of aportionof atwo-thick ness roof,,. i

'Figi3 is'a planivie'w of a portion of a one-thick-- ness roof The shingle a'ccording'to the invention, in the, embodiment selected for illustration, comprises a quadrilateralbody 10 having an upper edge 12' and a lower edge 14. The side of the shingle is defined by edge portions as follows: a vertical edge portion 16 and an inwardly extending horiinga re-entrant'angle 26. An inwardly and upzontal edge portion 18,'together defining a lockingtab 20. There follows an upwardly and outwardly inclined edge; portion 22 and-a horizontal outwardly.extending'edge portion 24 definwardly inclined portion 28 and a horizontal outwardly extending edge portion define a second re-entrant angle 32, vertically aligned above the first re-entrant' angle 26.- The portions 24 and 28.

are joined by a curved portion 34'.

Beyond the'midpoin't of the. horizontal portion 30, the rest of the side'of the shingle is a geometrical replica of the lower portion, reversed by rotating the same 180 about the midpoint of the horizontal portion 30. This developsan upwardly and inwardly inclined portion 36, joined by a concave curve to a horizontal outwardly extending portion 38, above'which is the upwardly and.

outwardly extending straight portion'40, the in--' wardly extending horizontal portion 42, and the vertical portion 44 reaching theupper edge 12.

In laying a two-thickness roof according to the invention, the firstcourse46 may be started with the usual starting strip,'and the second course 48 is laid with'its tabs 20 hooked into "the angles 26 of the course below. Similarly, the succeeding courses 50, 52,54 and 56 are each vlaidwith their tabs 20 hooked. into the angles 26 of the,

course below, When laid in this way, theangles '32 perform no interlocking function, being merely part of the contour of the portion of the shingle underlying the courses higher up. It willbe ob- 150' served that the lower edge of shingles in course 56 is substantially coincident with the upper edge of the shingle in course 48, so thatno portion of the roof is covered by less than two thicknesses of material.

Referring to 3, thefirst: course 58 maybe 64," and; 66 are -all similarlylaid. This leaves the angle 26 of each 'shingleperforming no interlocking iunction. It also leaves theed portions 24, -34,fand"28 of each shingle-exposed to Zdeiine a slight offset or shelterin the otherwise-approximately ,hex'agonal contour of the exposed portion of the shingle. Itwill-be noted that shingles 66 overlap shingles 62 by a dis-1 tance indicated at 68, which may be made the minimum necessary to prevent rain beating through the roof at this point, so that as large so fully explain the gist of .my invention that others man by applying knowledge current at the time of application, readily adapt the same I for useunder various conditions of service.

. I claim:

1. A shingle having a generally quadrilateral a .85

body with the upper and lower edges parallel, and upwardly divergent sides-defined by, a vertical edge joining a'horizontalinwardly extending V edge forming a locking tab at the lower corner of the shingle, then from'the inner end of the horizontal edge a straight upwardly and outwardly extending edge-joiningbelow the middle to I of the shingle with a horizontal outwardly ex-,'v

tending edge; which is curved at the end and joins an upwardly and inwardly extending edge joining with a horizontal outwardly extending edge atthe mid-portion ofthe'shingle, the contour of; the upper portion of the sides being complementary in reverse to, the-lower portionsn 2.'A shingle having a generally quadrilateral body with the uper and lower edges parallel, and sides defined by avertical edge joining a horizontal inwardly'extending edge forming a locking tab at the lower corner of the shingle, then continuing in a straight upwardly and outwardlyextendingiedgejoining with a horizontal outwardly extending edgewhich is curved at the outer end and joins an upwardly and inwardly extendingv edge joining with an outwardly extending horizontal edge at the middle of the shingle, the

upper portions of the sides being. complementary in reverse to the lower portions, the notch formed at the upper end of the upwardly and outwardly extending edge in the lower portion of the side being in vertical alignment with the notch formed at the inner end of the horizontal edge at the middle of the shingle.

3. A roof composed of uniform shingles having the upper and'lower'edges parallel and having locking tabs on the lower corners and notches in the sides, the tabs on one course being hooked locking tabby one-fourth the height of the shingle, thev lower notches being adaptedto receive the 7 tabs of the shinglesin the next course to provide so i v a two-thickness rooLand an upper notchspaced r t p otthe ockin ta yra d stan e equal'to the heigth of the shingle minus the necessary overlap in a one thickness roof cli videclby two, theupper notches. ,being adapted toreceive the tabs of the shingles in thenext course when a one thickness roof is beinglaid. 5. A shingle having a generally quadrilateral body with locking tabs at adjacent lower corners and a plurality of notches in thesides above said locking tabs, said notches including a lower notch spaced from the upper edge of the adjacent locking tab by one-fourth the height of the shingle, the lower notches being adapted to receive thetabs of the shingles in the next course t provide a twothickness roof, and an upper I notch spaced. from the top of the locking tab by a distance equal to the height of the shingle minus the necessasry overlap in a one-thickness roof divided by two, the upper notches being adapted to. receive the tabs of the shingles in the next course when a, one-thickness roof is being laid, the. vertical "separation between said two notches being substantially the height of the locking tabs. v

6. Shingles having locking tabs at adjacent lower corners of each shingle, and a plurality of notches in each side of each shingle above said lo in tabs: said not e bein a p d t ceivethelocking tabs Io f, shir;1gles; in the next course,,certain; of said; notches being positioned to interlock ;.t ,e.r s i e i ,ao e th c n roof with one predetermined figure design and to interlock theshingles into atwo thickness roof Withadifferent design."

DONALD H.

certain other of; saidnotchesibeing positioned 

